Vroman looks to me to be a taller version Bo Outlaw - except that he will be a better rebounder. The book on him is that he plays very hard all the time, goes hard to the glass all the time, and actually has some offensive skills.
Look at Bo's game and ask yourself what he did. He was a terrible shooter, not a particularly good rebounder, and not even an especially good man on man defender. But Bo played like maniac all the time, disrupting the opponent's offense, scrambling for loose balls, and being a general pest.
It's remarkable how useful that can be.